#include <stdio.h>


void mytest(void);

int main(int argc, char const *argv[])
{
    extern int a;
    mytest();
	mytest();
    return 0;
}
a=5;

void mytest(void)
{
	static int b=0;
    a+=3;
	b++;
    printf("a=%d,b=%d\n",a,b);
}
